Red sandstone with bedding planes at various angles.
The cross-bedding found in the Navajo Sandstone is the result of sand being moved by wind. As the sand dunes, which were once found in this ancient desert, were blown by prevailing winds, the sand tumbled down and collected on the dune face. As wind patterns changed, so would the direction of the bedding. More layers accumulated with constant dune migration and older deposits were continuously buried. In time, these deposits were solidified in place by mineral rich ground water.
U.S. National Park Service
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